Sean;they make one that will go inside a 1 inch pipe thread horizontal with a horizontal 3/4 inch float on it. The whole thing is brass but is only rated about 70lb max pressure. is aprox 14 inches long(with bulb) with about 1 1/2 inch female 3/4 inch thread outside tank. Not adjustable so you have to have it at your max water level. Bob

That's exactly the style of float I am familiar with. I can't tell how you are keeping it oriented inside the tank. Are you just letting it float up against the lid? Perhaps that will work but I wouldn't have thought of it.

Yep, it's just bumping up against the the underneath of the lid. Works like a charm. I sat out there on my first full up with the system in place to monitor the fill. I honestly though it wasn't going to work. Murphy's law and all. But it works flawlessly. I can't believe it. This is my answer. Highly recommend this mod.

Yes Bob And just so you know, I'm just as comfortable chatting with you about it as I would be a younger person. I respect all of you guys and many of you have no idea you are "virtual mentors" to us. As I type this...I realize that I forgot my tank was filling. Snow is gently falling, and I'm warm in our bus...not freaking out that I again flooded the luggage bay...because WAIT!, oh yeah! I have an auto shut off! Going to go out and turn off the water now.